Vulnerability-Lookup

GHSA-M538-6WP4-7H22

Vulnerability from github – Published: 2026-06-12 15:30 – Updated: 2026-06-12 18:31

Details

Crypt::PBKDF2 versions before 0.261630 for Perl are vulnerable to timing attacks.

These versions use Perl's built-in eq comparison. Discrepancies in timing could be used to guess the underlying derived-key.

Severity

5.9 (Medium)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

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{
  "affected": [],
  "aliases": [
    "CVE-2017-20240"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-208"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-12T14:16:28Z",
    "severity": "MODERATE"
  },
  "details": "Crypt::PBKDF2 versions before 0.261630 for Perl are vulnerable to timing attacks.\n\nThese versions use Perl\u0027s built-in eq comparison. Discrepancies in timing could be used to guess the underlying derived-key.",
  "id": "GHSA-m538-6wp4-7h22",
  "modified": "2026-06-12T18:31:53Z",
  "published": "2026-06-12T15:30:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-20240"
    },
    {
      "type": "WEB",
      "url": "https://github.com/arodland/Crypt-PBKDF2/pull/6"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/ARODLAND/Crypt-PBKDF2-0.161520/source/lib/Crypt/PBKDF2.pm#L123-148"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/ARODLAND/Crypt-PBKDF2-0.261630/changes"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/06/12/3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2017-20240 (GCVE-0-2017-20240)

Vulnerability from cvelistv5 – Published: 2026-06-12 13:19 – Updated: 2026-06-12 16:59

Title

Crypt::PBKDF2 versions before 0.261630 for Perl are vulnerable to timing attacks

Summary

Crypt::PBKDF2 versions before 0.261630 for Perl are vulnerable to timing attacks. These versions use Perl's built-in eq comparison. Discrepancies in timing could be used to guess the underlying derived-key.

Severity

5.9 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-208 - Observable Timing Discrepancy

Assigner

CPANSec

References

4 references

URL	Tags
https://github.com/arodland/Crypt-PBKDF2/pull/6	issue-tracking
https://metacpan.org/release/ARODLAND/Crypt-PBKDF…
https://metacpan.org/release/ARODLAND/Crypt-PBKDF…	release-notes
http://www.openwall.com/lists/oss-security/2026/06/12/3

Impacted products

1 product

Vendor	Product	Version
ARODLAND	Crypt::PBKDF2	Affected: 0 , < 0.261630 (custom)

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 5.9,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2017-20240",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-12T16:06:29.012440Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-12T16:06:56.547Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2026-06-12T16:59:33.477Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/06/12/3"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "Crypt-PBKDF2",
          "product": "Crypt::PBKDF2",
          "programRoutines": [
            {
              "name": "Crypt::PBKDF2::validate"
            }
          ],
          "repo": "https://github.com/arodland/Crypt-PBKDF2",
          "vendor": "ARODLAND",
          "versions": [
            {
              "lessThan": "0.261630",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Crypt::PBKDF2 versions before 0.261630 for Perl are vulnerable to timing attacks.\n\nThese versions use Perl\u0027s built-in eq comparison. Discrepancies in timing could be used to guess the underlying derived-key."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-208",
              "description": "CWE-208 Observable Timing Discrepancy",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-12T13:19:15.900Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/arodland/Crypt-PBKDF2/pull/6"
        },
        {
          "url": "https://metacpan.org/release/ARODLAND/Crypt-PBKDF2-0.161520/source/lib/Crypt/PBKDF2.pm#L123-148"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/ARODLAND/Crypt-PBKDF2-0.261630/changes"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to version 0.261630 or later."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "timeline": [
        {
          "lang": "en",
          "time": "2017-12-11T00:00:00.000Z",
          "value": "Issue reported as pull request"
        },
        {
          "lang": "en",
          "time": "2026-06-11T00:00:00.000Z",
          "value": "Version 0.261630 released with a fix"
        }
      ],
      "title": "Crypt::PBKDF2 versions before 0.261630 for Perl are vulnerable to timing attacks",
      "workarounds": [
        {
          "lang": "en",
          "value": "Apply the patch from the referenced pull request."
        }
      ],
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2017-20240",
    "datePublished": "2026-06-12T13:19:15.900Z",
    "dateReserved": "2026-05-26T18:23:21.387Z",
    "dateUpdated": "2026-06-12T16:59:33.477Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-M538-6WP4-7H22

CVE-2017-20240 (GCVE-0-2017-20240)

Tags

Sightings

Nomenclature